RHSA-2002:250 - Security Advisory

Topic

A remotely exploitable stack buffer overflow has been found in the Kerberos
v4 compatibility administration daemon distributed with the Red Hat Linux
krb5 packages.

[Updated 09 Jan 2003]
Added fixed packages for the Itanium (IA64) architecture.

Description

Kerberos is a network authentication system.

A stack buffer overflow has been found in the implementation of the
Kerberos v4 compatibility administration daemon (kadmind4), which is part
of the MIT krb5 distribution. This vulnerability is present in version
1.2.6 and earlier of the MIT krb5 distribution and can be exploited to gain
unauthorized root access to a KDC host. The attacker does not need to
authenticate to the daemon to successfully perform this attack.

kadmind4 is included in the Kerberos packages in Red Hat Linux Advanced
Server but is not enabled or used by default.

All users of Kerberos are advised to upgrade to these errata packages which
contain a backported patch and are not vulnerable to this issue.

Solution

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

Please note that this update is available via Red Hat Network. To use Red
Hat Network, launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

Affected Products

• Red Hat Enterprise Linux Server 2 ia64

Fixes

• BZ - 77316 - MITKRB5-SA-2002-002

CVEs

• CVE-2002-1235

References

(none)